Description The Power-Sonic PS Series have been evaluated and verified by CSIRO as conforming with the relevant requirements of the following criteria: Australian Standard AS 1603.4 Appendix G-1987, ‘Automatic fire detection and alarm systems – Control and indicating equipment’. The Power-Sonic PS Series batteries are approved by CSIRO for use in fire control and indicating equipment and are listed at ActivFire® Register of Fire Protection Equipment (Certificate No afp-2285). Designed for general purpose standby and light cyclic applications, the Power-Sonic PS range is a great economical option. Featuring all of the excellent Power-Sonic characteristics outlined in the overview, they have been designed as a low lost alternative.